TWI299133B - Webcasting system and audio regulating methods therefor - Google Patents

Description

1299133

达达编号号: TW2236PA IX. Description of the Invention: [Technical Field] The present invention relates to a method for processing audio, and more particularly to a method for adjusting audio data applied to network audio playback. [Prior Art] Generally, when a host having a sound card plays audio, it is an operating system such as Microsoft Windows, a mixing program such as >KMixer: kernel mixer, To control the amount of audio data transmission. Then, the hardware channel interface driver is used. Take Microsoft Windows as an example, that is, the miniport driver WavePci or WaveCyclic, etc., receive the audio data transmitted by the mixing program, and then output the audio data to the sound card. Used to play sound effects. In order for the mixing program to accurately provide data transmission, the hardware channel interface driver needs to provide the audio data playback position to the mixing program p. The mixing program uses the data playback position provided by the hardware channel interface driver to correctly control the amount of audio data transmitted to the hardware channel interface driver per second. However, if the audio is played over the network, since the host does not have a physical sound card, a virtual sound card is required to receive the audio poor material 5 and then transmit the audio data to the audio playback device through the network. The hardware channel interface driver calculates the amount of data required for the audio tribute during this period of time by the accumulation of time. 5 allows the mixing program to control the transmission of audio data to the hardware channel interface driver. The amount of information. To Microsoft 1299133

For example, the TW2236PA operating system uses Getposition() from the IMiniportWaveCyclicStream or IMiniportWaveCyclicStream interface to obtain the data transfer amount. In the example of the virtual audio driver (virtual audio driver), the implementation method of Getp〇siti〇n() is to obtain the current day between the first and the last call to GetpQsitiGn() for the transmission of the audio (4). Poor, and then calculate the approximate = play position according to the format and transmission rate of the audio data, so that the mix material is financially tested and (4) the amount of audio data transmission. However, when applied to real-time broadcast, the error of the calculated amount of transmission is accumulated by the basin ==(10)' and the number of times of the calculation of the amount of the bXe is insufficient. SUMMARY OF THE INVENTION The object of the present invention is to provide an audio signal transmission device, including a storage layer: mfr adjustment unit including a layer-level program and a:::point data volume: ==: The younger--(four) quantity and the second data amount & and the different layer program, and the layer-level program is passed back to the first quasi-audio data. The difference is the period == the sound material is converted to - virtual - an instant time point and the reference time point and the above data volume is the previous storage unit to the unit, the use, the amount of audio data. Used to store virtual audio data. Output 1299133

The three-digit number: TW2236PA is coupled to the adjustment unit and the storage unit for conversion to a format output. ^ θ information The present invention further provides a method for adjusting audio data. Audio data. Then, according to a desired capital. After that, calculate the - instant time point and a base two = wheel" „ a first amount of data, and calculate the first; the material 2 ^ a shell material 1 plus the total - and value, and return to the first layer ^ The integer part of the sum value is the dm base (four) point before the middle = the point "and the second data amount is before the sum of the sum of the sum of the sum of the values to make the above objects, features, and advantages of the present invention more obvious It is to be understood that the preferred embodiments are described below with reference to the accompanying drawings, which are described in detail below. [Embodiment] Referring to the drawings, FIG. 4 is a structure of the network playing system of the present invention. Figure. The network playback system i (10) includes an audio material transmitting device 110 and a playback device 120. The audio data transmitting device 11 converts the defective material S1' to output the network data to the network playing device 12, and the playing device 120 plays the audio according to the network data S4. The audio data transmitting device 110 carries a first layer program (1) and a second layer program 112. The second layer program 112 receives the audio data S1 sent by the first layer program (1), and then returns the expected data % of the audio data S1 to the final layer program 111. The first level program l is controlled by the expected data S2 7 1299133

Sanda number: TW2236PA Audio data transmission data S1, and the amount of data output from the shell material S1 to the second layer program 112. The device 110 converts the output audio using the second layer program 112 to generate the network material S4. The brother-level program mountain is, for example, the operating system operation = window operating system as an example, and the first layer program m is two: : 曰n (four) two-layer program 丨丨 2 the same Microsoft channel, the mini channel driver ,its

= The brother-level program 111 can control the audio transmission type I1! After receiving the audio data S1, the audio information "...", the virtual audio poor material S3, and the virtual audio data is transmitted to the r sound card m, virtual The virtual audio of the sound card 113; the transfer card 114 is converted into the network data S4 and rotated through the network. The virtual sound effect in A (1) is the storage unit of the audio data transmission unit, and the medium network card 114 is used as the output. The unit converts the virtual audio data into a transmittable format and outputs the network data S4, which can be sent to the network playback device 12 by means of a wired network or a network transmission. The network playback device 120 includes The network card 12 is a sound card 122 and amplifying, Λ 123. The Naka 121 heart is used as a receiving unit to receive the data through the network. After the decapsulation, the virtual audio signal % is generated, and then the sound card 122 is transmitted. The playable audio data S6 is generated for the audio playback unit through the sound reinforcement racquet 123. The sound card 122 of the playback device 12 is a physical sound card. 8 1299133

Ξ2: TW2236PA In the audio data transmission device il terminal, in order to enable the second energy dog to provide the first layer of the program (1) in the actual playback, the audio data ^ the amount of data to be transmitted, to avoid the network playback device 12 The player, because the amount of audio data and the audio position can not correspond to the explosion of the current ^ is determined by a number of ways to obtain the amount of data transmitted by the audio data to solve the second picture, the picture is printed. When the second-level program 112 manages the situation, ., and can't bear it, when the expected data of the 曰B枓S1 is committed, it is to avoid the error of the material, and select a reference time point for comparison to obtain the seam (4) S2. . As shown in Figure 2, the playback time point of ^ is the instant time point n di Ding " ^ Do not compare with the base tree _ order, you can ask for 彳 (4) 舁刖 an instant time point T 〇 between the audio I, Τ 1 Expected data 82, to return to the amount of data in the first layer of the transmission, that is, the TO system is the first time ± * 1U. 珂 - instant time point two people fl ... fl 枓 枓 S1 when the transmission of data is clear and reference 2 and Fig. 3. In the first month of the month, in the method of adjusting the amount of audio data, the flow handle is as follows: step: to obtain the reference time (10). Then RT 'instant time point Τ 1 feed (four) step The time difference TD is calculated as the first time;; the point between the base materials is the instantaneous time point τι and the reference time point, ΒΤ: the data amount D1 is the data volume of the transmission. s '曰讯资料S1 as shown in step 33, before use — Point BT time difference TD〇, calculate the point TO, the quasi-time, the inner D〇, and then obtain the 1299133 three-number: tW2236Pa data round-off, that is, the first data amount, and the last income is the zero The amount of data (10), the difference between the data, the difference between the data and the data 2H does not generate a period of audio data based on the second amount of data D2 of the difference The Emperor 1 layer program 111 is able to adjust the amount of data transmitted by the 曰Beibei S1 according to the expected data s 2 DO ^ 32 33 t 5 ^f'4t TD 0, the time difference 2' 乂 and the younger brother - the amount D The 2 series are respectively obtained according to the time difference. And the time difference TD2 is multiplied by the bit rate. In this example, in order to avoid excessive playback of the audio, an overflow 〇-π 4 quasi-time point is generated. For example, After the material, the shape-new = day-to-day BT is used to replace the reference time point βτ, and the expected data S2 is obtained from the reference time.

In this embodiment, each time the expected data s2 is calculated, the difference between the h•interpoint BT and the instant time point T1, the bucket pipe, the earthworm early, and the point 11 is not correct. As the technical towel is provided, it provides a popping phenomenon caused by the rough reduction. In the other embodiment, the relative time difference between the current time point and the time point of the previous calculation of the amount of data transmitted by the audio material S1 is directly taken: the expected wide: S2. Since the desired material S2 is an integer 'with respect to a data unit', for example, 1 bit is a byte. In order to avoid the accumulation of errors caused by multiple rejections of the small eight, this embodiment will be less than each time - information sheet: 1299133

The amount of transmission data of the three-numbered TW2236PA is accumulated and recorded. Figure 4 is a flow chart showing a method of adjusting audio data according to another embodiment of the present invention. First, as shown in step 41, the latest audio data output D is retrieved since the last time the audio data output is calculated. Referring to Fig. 2, the audio data output D is the audio data output from the previous instant time point TO to the instant time point T1. Then, in step 42, the audio data output D obtained in step 41 is summed with the original cumulative output DT. The cumulative output DT is the fractional part of the audio data output from the reference time point BT ¥ to the previous instant time point TO in Fig. 3. Then, in step 43, the desired data S2 is generated based on the integer portion [DT] obtained by adding the sum to adjust the output of the audio material S1. In step 44, the cumulative output DT is updated to the fractional portion DT - [DT] resulting from the sum of the sums, thus repeating until the end of the audio. Assume that the original audio feed output D is set to 2.13244, and the original cumulative output DT is 0. 6 bytes, and the sum value is 2. 73244. In step 43, the integer part [DT] = 2 bit B group of the sum value is taken as the expected data S2, and in step 44, the cumulative output quantity DT is re-recorded as the fractional part of the sum value DT_[DT] = 0.73244 bytes, so as to be the basis for accumulation when the desired data S2 is obtained next time. The original output of the audio data is 2.13244 bytes, and the original cumulative output DT is 0. 9 bytes, and the sum value is 3. 03244 bytes. In step 43, the integer part [DT] = 3 bytes of the sum value is taken as the expected data S2, and in step 44, the accumulated output DT is re-recorded as the fractional part of the sum value DT - [DT] = 0. 03244 bytes to 11 1299133

Ϊ́2: TW2236PA will be used as the basis for accumulation next time the expected data S2 is transferred. ... The network playback system and the method of adjusting the audio data disclosed in the above embodiments can not only use the concept of the network to play audio, but also further use the wireless network control network audio playback device to play audio. And the amount of displacement of the audio data can be accurately provided on the sound transmitting device end, so as to enable

The material and the position of the error # #合F's popping and so on. θ accumulation 'and avoiding the lack of data to produce its wealth (4) has been (10) good implementation _ as above, but within the spirit and scope of the invention, you can include S without departing from the scope of protection of the invention: ... = with Retouching, therefore, the one defined by the patent of Yiyi Ming shall prevail. [Simple description of the system] The frame of the system = the picture shows the network audio playback according to the invention - the embodiment J 2 = the time point of the audio data output. Flow chart brother. Figure 3 is a flow chart showing the method of adjusting the amount of audio data in an embodiment. The figure shows the method for adjusting the amount of audio data in another embodiment. [Main component symbol description] 1〇〇: Network playback system I10 ··Audio data transmitting device 12 1299133

Sanda number: TW2236PA 111 : First layer program 112 : Second layer program 113 : Virtual sound card 114 : Network card 120 : Playback device 121 · · Network card 122 : Sound card 123 : Sound reinforcement la <

Claims (1)

1299133 ΐ达号: TW2236PA X. Patent application scope: L kinds of audio data transmitting devices, including ·· -- Shitian Mouth, mouth, early and late, receiving an audio message, including: - the first layer program The second layer of the sound is adjusted according to the output of the poor material; and the four-bed material is used to calculate the time point and the time of the input time of the reference time point H-input material and calculate the first- The amount of data and _ second = ^ 1 - the amount of data, passed to the m and will "; = = difference, and return the bedding to - virtual audio data, the audio from the punch, the difference, the difference The expected data, between the time point of the time and the reference time point, the message; that is, the message ^^ and the unit, _ to the unit, the heart ^ the virtual line to the sound, the audio card, ^ This patent is the audio data transmitting device described in item 1. The mixing program of the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ , complex ^ such as the scope of patent application! The audio data transmission "reading unit" is a wired network card or a wireless network card. b• An audio data transmitting device, comprising: 14 1299133 Sanda number·· TW2236PA an adjusting unit that receives an audio data The method includes: a first layer program for adjusting the output of the audio data according to a desired data; and a second layer program for calculating an instant time point and a reference time point, the audio data a first amount of data of the output, and calculating a sum of the first amount of data and a second amount of data, and returning to the first layer of the program, and transmitting the first layer of the program The audio data is converted into a virtual audio data, where the integer part of the sum is the desired data, the reference time point is the previous instant time point, and the second data amount is the previous total amount. a fractional portion of the sum value; a storage unit coupled to the adjustment unit for storing the virtual audio tribute, and an output unit coupled to the adjustment unit and the storage unit The audio data transmitting device according to claim 5, wherein the first layer of the operating system of the adjusting unit is a mixing program of the operating system. The audio data transmitting device of claim 5, wherein the second layer of the adjusting unit is a channel interface driver. 8. The audio data transmitting device according to claim 5 The output unit is a wired network card or a wireless network card. 9. A network playing system, including: an audio tributary transmitting device 'includes: 15 1299133 two numbers · TW2236PA one adjusting unit, Pick up - ~ close the collection of materials, including: the output of the audio data; ^ according to - expected data adjustment and - reference time point:: = formula 2 used to calculate - instant time point amount, and calculate Today's = one of the rounds of the shellfish - the data and the heart of the 5 Haidi - the amount of data, the shell material is returned to the first layer of the program, the difference - the audio data is converted to - virtual Between the time point and the reference time point, the difference between the time point and the reference time point is 兮4: 二枓=,, that is, a round of 忒曰矾Quantity; ^ 渚存早70, coupled to the adjustment unit for eroding the six # virtual audio data; and for storing the element for the ^! unit, _ to the adjustment sheet 7^ and the storage single channel Data; and transmission format output one network one playback device, including: generating a j-receiving unit 'heart connection (four) network (four), after conversion to generate virtual audio data; and picking up - vertical - audio playback unit, lightly connected To the receiving unit, the information is used to play the virtual information and play the output. μ Please refer to the network playing system described in claim 9 of the patent range, the mixing program of the operating system of the brother-layer program. ...the netizen system described in item 9 of the patent scope, the second-tier program is a channel interface driver. 16 1299133 Sanda number: TW2236PA 12·If the patent is in the patent application, the round-up unit is a wired or cable network playback system, which is 1 Q f ^ 卞 or a m-line network card. 3. In the scope of the patent application, the receiving unit is a network playing system as described by the L member, an H-way card or a wireless network card. 14. A network playing system, comprising: - an audio data transmitting device, comprising: - Shida d々 口一•早兀'received-audio data, including: and - reference time point 罝, and calculating the first A data: Bellow #口值, sub-transfer to the first layer of the program, and convert the audio data transmitted from the first layer into a virtual audio material; the integer part of the iV Wei is the desired data, The reference time = the instant time point, and the second data quantity is the first 2 忒 and the fractional part of the value; one of the storage units is coupled to the adjustment unit for virtual audio data; An output unit, coupled to the adjustment unit and the second storage unit: to convert the virtual audio data into a transportable poor material; and, a playback device, comprising: a receiving unit, configured to receive the network data After conversion 17